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Dynamic detection of academic team communities based on temporal coauthor network 15

Dynamic detection of academic team communities based on temp...

引用

15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Wan, Wencong Huang, Fang Wang, Xiangqian Zhang, Yuchen Zhang, Chengyuan Cent South Univ Sch Informat Sci & Engn Changsha 410083 Hunan Peoples R China

ISBN: (纸本)9781538637906

As the status of team members and relationships between them change over time, the importance of membership nodes in the academic team also change, so that the academic team organizational structure evolves. The changes caused by the core members of the team led to the evolution of the team structure. Therefore, this paper presents a dynamic community discovery algorithm based on temporal coauthor network. By detecting the importance of nodes, the strength of relative edges, and its variation of persistence with time, the proposed algorithm implements creation, extension, shrink, division and disappearance operations on the communities in order to achieve the purpose of dynamic community discovery. In addition, for assessing the quality of community division, the paper proposes a method based on the interest similarity of Chinese key characters feature of academic teams. In experiment, a public document record dataset and several synthetic dataset are used to verify the effectiveness our algorithm.

关键词： evolution of academic team temporal coauthor network importance of node similarity of character feature

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Flow Migrations in Software Defined Networks: Consistency, Feasibility, and Optimality 15

Flow Migrations in Software Defined Networks: Consistency, F...

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15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Chen, Yang Zheng, Huanyang Wu, Jie Temple Univ Dept Comp & Informat Sci Philadelphia PA 19122 USA

ISBN: (纸本)9781538637906

Software defined networks always need to migrate flows to update the network configuration for a better system performance. However, the existing literature does not take flow path overlapping information into consideration when flows' routes are re-allocated. Consequently, congestion happens, resulting in deadlocks among flows and link resources, which will block the update process and cause severe packet loss. This paper resolves deadlocks with the help of spare resources during the network update. An algorithm is proposed to determine the feasibility of the consistent flow migration. We demonstrate that even if there are multiple consistent migration plans, finding the optimal one that occupies the fewest leisure bandwidth resources is NP-hard. An approximation algorithm is proposed to sequentially migrate flows in a consistent way. Extensive simulations show that our solution achieves a much smaller traffic loss rate at the cost of an affordable spare link resource usage compared to prior methods.

关键词： Software Defined Networks (SDNs) spare links consistent flow migration feasibility and optimality

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A Dynamic Placement Policy of Virtual Machine Based on MOGA in Cloud Environment 15

A Dynamic Placement Policy of Virtual Machine Based on MOGA ...

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15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Zhang, Mohan Ren, Honglin Xia, Chunhe Beihang Univ Sch Comp Sci Beijing Key Lab Network Technol Beijing Peoples R China Guangxi Normal Univ Sch Comp Sci & Informat Technol Guangxi Peoples R China

ISBN: (纸本)9781538637906

Currently loud data centers exist problems of load imbalance and high power consumption. This paper studies the virtual machine placement policy in cloud environment by applying live migration techniques, and proposes a target host selection algorithm MOGA-THSA based on MOGA. As a heuristic algorithm, through designing excellent genetic operators and fitness functions, it optimizes the load balance and power consumption of the data center with smaller SLA violation rate. The algorithm is implemented on simulation platform CloudSim, and experiments show that it can improve the load balance of cloud data center and decrease total power consumption effectively, thus having a certain guiding significance for researching the virtual machine placement policy.

关键词： Cloud Datacenter Placement Policy Load Balance Power Consumption MOGA

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Euler Meets GPU: Practical Graph Algorithms with Theoretical Guarantees 35

Euler Meets GPU: Practical Graph Algorithms with Theoretical...

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35th ieee international parallel and distributed processing symposium (IPDPS)

作者： Polak, Adam Siwiec, Adrian Stobierski, Michal Jagiellonian Univ Fac Math & Comp Sci Krakow Poland

ISBN: (纸本)9781665440660

The Euler tour technique is a classical tool for designing parallel graph algorithms, originally proposed for the PRAM model. We ask whether it can be adapted to run efficiently on GPU. We focus on two established applications of the technique: (1) the problem of finding lowest common ancestors (LCA) of pairs of nodes in trees, and (2) the problem of finding bridgis in undirected graphs. In our experiments, we compare theoretically optimal algorithms using the Euler tour technique against simpler heuristics supposed to perform particularly well on typical instances. We show that the Euler tour-based algorithms not only fulfill their theoretical promises and outperform practical heuristics on hard instances, but also perform on par with them on easy instances.

关键词： graph algorithms parallel algorithms

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Job Scheduling Optimization of High Performance Computing in Biological Gene Sequencing Based on Workload Analysis 15

Job Scheduling Optimization of High Performance Computing in...

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15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Wu, Xiaofei Dong, Shoubin Sun, Yizhen Zuo, Liyun South China Univ Technol Guangdong Key Lab Commun & Comp Network Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781538637906

Mining job scheduling features based on extraction and analysis of workload trace in high performance computing clusters can be used to optimize scheduling strategy and enhance system performance. Based on detailed analysis of workload trace from a gene sequencing high performance computing system, this paper proposes a multi-queue backfilling scheduling algorithm, which is based on traditional backfilling scheduling. While optimizing for memory resource demands, this algorithm provides queue level load balancing to deal with the innate load imbalance characteristics of high performance systems. Experimental results based on practical gene sequencing workload trace clearly demonstrate that compared with traditional scheduling algorithms, the algorithm proposed in this paper is a good strategy to reduce the job waiting time and improve resource utilization.

关键词： high performance computing job scheduling backfilling load imbalance

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A Service-reliability-based Resource Mapping Method in Smart Grid Virtual Networks 15

A Service-reliability-based Resource Mapping Method in Smart...

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15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Sun, Li-Qian Chen, Xing-Yu Feng, Qi Guo, Shao-Yong Xu, Si-Ya Beijing Univ Posts & Telecommun State Key Lab Networking & Switching Technol Beijing Peoples R China

ISBN: (纸本)9781538637906

In order to guarantee the reliability of services and reduce the waste of resources in traditional dual-path protection method, a service-reliability-based resources mapping method is proposed in this paper. The virtualization technology is adopted in our method for smart grid Fiber-Wireless access networks. Firstly, a priority-and fault-probability based primary link mapping model is set up. It classifies the service priorities level and provides high-priority services with high-reliability links to improve service reliability of the whole network. Then, a resource-saving aimed backup link mapping model is established to allocate the multiple services as many as possible for one backup link to save resources. At last, the genetic algorithm is used to solve the mapping model. The evaluation results show that our proposed method increases service reliability, and improves resource utilization.

关键词： SDN communication networks resource mapping failure probability resource saving ubiquitous network

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Contactless Measurement of Pose in the Earth Frame using a Mobile Phone 15

Contactless Measurement of Pose in the Earth Frame using a M...

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15th ieee international symposium on parallel and distributed processing with applications (ISPA) / 16th ieee international Conference on Ubiquitous Computing and Communications (IUCC)

作者： Wang, Zhen Xiu, Liang Zhejiang Univ Coll Comp Sci & Technol Hangzhou Zhejiang Peoples R China Zhejiang Univ Sch Software Technol Ningbo Zhejiang Peoples R China

ISBN: (纸本)9781538637906

In this paper, we propose an accurate contactless pose estimation method for the pose of a target in the earth coordinate frame using a mobile phone equipped with a camera and an inertial measurement unit (IMU). Under the Manhattan world assumption, we first estimate the relative pose between the target and the camera using an existing line-based pose estimation method and then seek the target's pose in the earth frame by combining the visual pose and the IMU orientation. To improve the overall estimation accuracy, we propose a new camera-IMU relative pose calibration method, where we take the different stochastic nature the accelerometer and magnetometer measurements into consideration, and propose a new a consistency measure defined on elevation and azimuth angles. When compared to state-of-the-art methods, it demonstrates strong advantage on both elevation and azimuth estimation accuracy while featuring convenient calibration setting-up. We also report the improved overall pose estimation accuracy based on evaluations on a real-world dataset using our method, in contrast to an uncalibrated phone.

关键词： mobile phone pose IMU measure

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Performance Study of Interference on Sharing GPU and CPU Resources with Multiple applications

Performance Study of Interference on Sharing GPU and CPU Res...

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23rd ieee international parallel and distributed processing symposium

作者： Yamagiwa, Shinichi Wada, Koichi INESC ID Rua Alves Redol 9 P-1000029 Lisbon Portugal Univ Tsukuba Dept Comp Sci Tsukuba Ibaraki 305 Japan

ISBN: (纸本)9781424437511

In the last years, the performance and capabilities of Graphics processing Units (GPUs) improved drastically, mostly due to the demands of the entertainment market, with consumers and companies alike pushing for improvements in the level of visual fidelity, which is only achieved with high performing GPU solutions. Beside the entertainment market, there is an ongoing global research effort for using such immense computing power for applications beyond graphics, such as the domain of general purpose computing. Efficiently combining these GPUs resources with existing CPU resources is also an important and open research task. This paper is a contribution to that effort, focusing on analysis of performance factors of combining both resource types, while introducing also a novel job scheduler that manages these two resources. Through experimental performance evaluation, this paper reports what are the most important factors and design considerations that must be taken into account while designing such job scheduler.

关键词： Graphics processing unit

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Stream processing on Multi-Cores with GPUs: parallel Programming Models' Challenges 33

Stream Processing on Multi-Cores with GPUs: Parallel Program...

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33rd ieee international parallel and distributed processing symposium (IPDPS)

作者： Rockenbach, Dinei A. Stein, Charles M. Griebler, Dalvan Mencagli, Gabriele Torquati, Massimo Danelutto, Marco Fernandes, Luiz G. Tres De Maio Fac SETREM Lab Adv Res Cloud Comp LARCC Tres De Maio Brazil Pontifical Catholic Univ Rio Grande Sul PUCRS Sch Technol Porto Alegre RS Brazil Univ Pisa UNIPI Comp Sci Dept Pisa Italy

ISBN: (纸本)9781538655559

The stream processing paradigm is used in several scientific and enterprise applications in order to continuously compute results out of data items coming from data sources such as sensors. The full exploitation of the potential parallelism offered by current heterogeneous multi-cores equipped with one or more GPUs is still a challenge in the context of stream processing applications. In this work, our main goal is to present the parallel programming challenges that the programmer has to face when exploiting CPUs and GPUs' parallelism at the same time using traditional programming models. We highlight the parallelization methodology in two use-cases (the Mandelbrot Streaming benchmark and the PARSEC's Dedup application) to demonstrate the issues and benefits of using heterogeneous parallel hardware. The experiments conducted demonstrate how a high-level parallel programming model targeting stream processing like the one offered by SPar can be used to reduce the programming effort still offering a good level of performance if compared with state-of-the-art programming models.

关键词： Graphics processing units parallel processing parallel programming Kernel Instruction sets Computational modeling

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Enhancing Java Streams API with PowerList Computation 34

Enhancing Java Streams API with PowerList Computation

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34th ieee international parallel and distributed processing symposium (IPDPS)

作者： Niculescu, Virginia Bufnea, Darius Sterca, Adrian Babes Bolyai Univ Fac Math & Comp Sci Cluj Napoca Romania

ISBN: (纸本)9781728174457

Since they were introduced, Java streams were very fast embraced by the industry, being currently used at a large scale. The parallelism enabled by them is very easy to achieve, but it is constrained either by the used parallelism model (in some cases), or by the set of operations that could be specified using streams. We investigate in this paper the possibility to enhance the computation types that could be defined using the Java streams API by introducing into this infrastructure the PowerList theory based computation. Powerlists are recursive data structures that together with their associated algebraic theory offer both abstractions in order to ease the development of parallel applications, and also a methodology to design parallel algorithms. The Java streaming infrastructure could be adapted to support them in a great measure. We present here such an adaptation, and we analyse and discuss the advantages and constraints. This analysis is exemplified by application examples.

关键词： parallel programming streams recursive structures Java performance models

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